feat: add respective `json_is` UDFs for JSON type #19810

Job	Run time
Check typos and docs	6s
Build GreptimeDB binary (profile-CI) (ubuntu-20.04)	3m 0s
Build GreptimeDB binaries (ubuntu-20.04)	3m 2s
Check (windows-2022)	7m 57s
Check (ubuntu-20.04)	2m 17s
Rustfmt	52s
Check License Header	2m 10s
coverage	14m 52s
Toml Check	2m 21s
Clippy	3m 28s
Fuzz Test with Chaos (Distributed, Remote WAL, fuzz_migrate_mito_regions)	7m 25s
Fuzz Test (Distributed, Remote WAL, fuzz_create_table)	7m 16s
Fuzz Test with Chaos (Distributed, Remote WAL, fuzz_failover_mito_regions)	7m 35s
Fuzz Test (Distributed, Remote WAL, fuzz_alter_table)	6m 40s
Fuzz Test with Chaos (Distributed, Remote WAL, fuzz_failover_metric_regions)	8m 19s
Fuzz Test (Distributed, Remote WAL, fuzz_create_database)	6m 23s
Fuzz Test (Distributed, Remote WAL, fuzz_create_logical_table)	6m 46s
Unstable Fuzz Test (unstable_fuzz_create_table_standalone)	5m 49s
Fuzz Test (Distributed, Remote WAL, fuzz_alter_logical_table)	6m 38s
Fuzz Test (Distributed, Remote WAL, fuzz_insert)	6m 29s
Fuzz Test (Distributed, Remote WAL, fuzz_insert_logical_table)	8m 27s
Fuzz Test (fuzz_create_table)	3m 48s
Sqlness Test (Basic)	2m 42s
Fuzz Test (fuzz_alter_table)	3m 54s
Fuzz Test (fuzz_create_database)	3m 51s
Sqlness Test (Remote WAL)	3m 7s
Fuzz Test (fuzz_create_logical_table)	4m 12s
Fuzz Test (fuzz_alter_logical_table)	4m 17s
Fuzz Test (fuzz_insert)	4m 2s
Fuzz Test (fuzz_insert_logical_table)	4m 9s
	2h 31m 54s

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